Do you use spikes for tile/marbel floor?

It depends. My Martin Logans prefer brass spikes into brass cups and my Thiels prefer thin nylon washers.

Replace the spikes with Black Diamond Racing Cones. The BDR cones will not harm your floor and will allow your speakers to reach their full potential.

I prefer to use a brass coupling disk that can be found at: audiopoints.com mine have worked great on hard wood floors, concrete, and the bottom side of my stereo components where the point of a spike meets the bottom of the equipment.

If you have the option flip your spikes over and put the rounded end on the floor. This has worked well on my pergo and slate floors.

What about using spikes on a regular wall to wall carpeted cement floor? That's what I do. Is this a good thing? I have heard that it is and that it isn't.